Eaton MPSC303HEAXX2A Magnum low voltage power circuit breaker - UL Listed
Part Number: MPSC303HEAXX2A
Quick Summary
Eaton MPSC303HEAXX2A Magnum low voltage power circuit breaker delivers reliable overcurrent protection for industrial electrical panels and feeders. Too often facilities face nuisance trips and downtime from miscoordination or undersized protection, increasing maintenance costs. This model carries UL Listed safety certification, ANSI/CSA compliance, and Lloyd's Register certification, ensuring regulatory alignment and global suitability. Built for the Power Xpert Release PXr20 LSI trip unit and fixed horizontal mounting, it supports selective coordination and faster service in rugged environments. For procurement teams, this translates into easier panel integration, reduced risk of overprotection, and a clear path to compliance across North American and international projects.
Product Information
Extended Description
MPSC303HEAXX2A Eaton: Eaton Magnum low voltage power circuit breaker, Magnum PXR, Standard frame, 3000 A, 100 kA, Three-pole, Fixed horizontal mounting, PXR20 LSI trip unit
Product Name
Eaton Magnum low voltage power circuit breaker
Catalog Number
MPSC303HEAXX2A
UPC
786689637545
Product Length/Depth
14.6 in
Product Height
16.8 in
Product Width
16.2 in
Product Weight
118 lb
Compliances
NEMA Compliant CE Marked CCC Marked SABA Listed
Certifications
Lloyd's Register Certified KEMA Certified UL Listed ANSI CSA Certified ABS Certified DNV GL Certified
Zone selective interlocking application paper
Magnum circuit breakers with Power Xpert Release trip units product aid
Selevctive coordination application paper - IA0120000E3
Magnum PXR and PD-SB double and double narrow frame UL Certificate of Compliance
Magnum PXR and PD-SB double and double narrow frame UL Certificate of Compliance
Microsoft Word - Power Xpert Protection Manager Quick Start Guide.docx
Microsoft Word - Power Xpert Protection Manager Quick Start Guide.docx
Microsoft Word - Power Xpert Protection Manager Quick Start Guide.docx
Circuit Protection, Power Breakers, Contactors and Fuses, Volume 4, Tab 3
Power Xpert Protection Manager x64 22.6 1
Power Xpert Protection Manager x64 22.6 1
Eaton Specification Sheet - MPSC303HEAXX2A
Eaton Specification Sheet - MPSC303HEAXX2A
Magnum low-voltage power circuit breakers (ANSI and IEC) renewal parts and accessories
Magnum PXR 20/25 electronic trip units time current curves
Molded case and low-voltage power circuit breaker health
Molded case and low-voltage power circuit breaker health
Molded case and low-voltage power circuit breaker health
Feature: Three-pole, fixed horizontal mounting with a 100 kA interrupt capacity. Business Impact: Enables reliable protection for large panels and feeders without frequent trips, reducing unscheduled downtime. Application: Suitable for motor control centers and distribution panels in manufacturing environments. Feature: PXR20 LSI trip unit integration. Business Impact: Improves selective coordination, minimizes nuisance trips, and supports fast, site-friendly fault isolation. Application: Industrial process lines and automated plants requiring precise protection settings. Feature: Standard frame with 3000 A rating. Business Impact: Handles high fault currents and simplifies integration into existing LV distribution schemes, lowering redesign costs. Application: Large-scale power distribution in heavy industry. Feature: Wide certification portfolio (UL Listed, ANSI/CSA, CE Marked, Lloyd's Register, KEMA, ABS, DNV GL). Business Impact: Reduces validation effort, accelerates compliance across multiple regions, and supports global projects. Application: Global manufacturing and offshore facilities. Feature: Fixed horizontal mounting with clear accessibility. Business Impact: Streamlines installation, wiring, and future maintenance, cutting labor time and risk during service calls. Application: New builds and retrofit projects in panel assemblies.
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FAQs
This model uses a fixed horizontal mounting arrangement designed for straightforward panel integration. Ensure there is adequate clearance for wiring and field connections, verify alignment with the standard frame and three-pole configuration, and check that mounting hardware is compatible with the enclosure. The PXr20 LSI trip unit requires proper seating and calibration per the user guide to maintain accurate protection curves.
Key specs include a three-pole configuration, a 3000 A frame rating, and a 100 kA interrupt capacity, paired with a PXR20 LSI trip unit. It is UL Listed and CE Marked with ANSI/CSA certifications. The unit is designed for low-voltage protection in industrial panels and supports selective coordination within power distribution schemes.
Yes. The MPSC303HEAXX2A is designed for selective coordination when paired with the Power Xpert Release PXr trip units. Its 100 kA interrupt capacity and fixed mounting support reliable fault isolation in motor control centers, reducing the impact of upstream faults on downstream equipment and helping to meet coordination studies and NFPA 70 requirements.
The breaker carries UL Listed status and ANSI/CSA certifications, along with CE marking, and Lloyd's Register, KEMA, ABS, and DNV GL certifications. This broad certification portfolio facilitates cross-border procurement, reduces revalidation during audits, and supports compliance for marine, offshore, and industrial installations.
The PXr20 LSI trip unit enables precise protection settings and selective coordination, which lowers nuisance trips and extends mean time between maintenance events. Fixed horizontal mounting simplifies installation and service access, reducing labor costs. Over time, this translates to improved uptime, lower energy waste from unnecessary trips, and a faster route to regulatory compliance across multiple sites.